<servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>CheckAccount</servlet-name> <servlet-class>com.ht.servlet.CheckAccount</servlet-class> </servlet> <servlet-mapping> <servlet-name>CheckAccount</servlet-name> <url-pattern>/login</url-pattern> </servlet-mapping> </web-app>
request.getRequestDispatcher("你请求的那个jsp页面").forward(request,response);
开发环境myeclipse+tomcat5先创建web project，项目名为test，在webroot 目录下创建login.jsp文件login.jsp<body>
<form action="login">
username:<input type="text" name="username"><br>
password:<input type="password" name="pwd"><br>
<input type="submit">
</form>
</body>在scr目录下的com.ht.servlet编写AcountBean.java文件package com.ht.servlet;public class AcountBean {
private String username="";
private String password="";
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}}
编写servlet类CheckAccount.java文件package com.ht.servlet;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.http.*;public class CheckAccount extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession();
AcountBean account = new AcountBean();
String username = request.getParameter("username");
String pwd = request.getParameter("pwd");
account.setUsername(username);
account.setPassword(pwd);
if ((username != null) && (username.trim().equals("jsp"))) {
if ((pwd != null) && (pwd.trim().equals("1"))) {
System.out.println("session");
session.setAttribute("account", account);
String logon_suc = "session.jsp";
response.sendRedirect(logon_suc);
return;
}
}
String logon_fail = "fail.jsp";
response.sendRedirect(logon_fail);
return;
}public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { doGet(request, response);
}}在webroot目录下编写session.jsp文件 成功后跳转 <body>
<%
com.ht.servlet.AcountBean account=(com.ht.servlet.AcountBean)session.getAttribute("account");
%>
username: <%=account.getUsername() %>
<br>
password:<%=account.getPassword() %>
</body>编写fail.jsp文件 失败后跳转<body>
Logon Failed <br>
</body>下面是web.xml文件<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<welcome-file-list><welcome-file>login.jsp</welcome-file></welcome-file-list>
<servlet>
<description>This is the description of my J2EE component</description>
<display-name>This is the display name of my J2EE component</display-name>
<servlet-name>CheckAccount</servlet-name>
<servlet-class>com.ht.servlet.CheckAccount</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>CheckAccount</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>
<body onload="/servlet?action=back">Servlet code:
if(request.getPrameter("action")!=null) {
request.getRequestDispatcher("index.jsp").forward(request,response); }